<template>
<h1>计算器练习</h1>
  <input type="text" v-model="a">
  <input type="text" v-model="b">
  <br>
  <button @click="calc('+')">加</button>
  <button @click="calc('-')">减</button>
  <button @click="calc('*')">乘</button>
  <button @click="calc('/')">除</button>
  <h4>结果是:{{res}}</h4>
</template>

<script setup>
import {ref} from "vue";

const a = ref('');
const b =ref('');
const res = ref('');
const calc = (o)=>{
  res.value=eval(a.value+o+b.value);
}
</script>


<style scoped>

</style>